World Swedish official Anders Tegnell says ‘herd immunity’ in Sweden might be a few weeks away April 28, 2020 Kim Hjelmgaard, USA TODAY Comments Off on Swedish official Anders Tegnell says ‘herd immunity’ in Sweden might be a few weeks away Sweden is accused of dangerously pursuingĀ a 'herd immunity' coronavirus strategy. Its top COVID-19 official Anders Tegnell said it was 'sustainable.'